The International Energy Conservation Code (IECC) is a model energy code, which can be adopted in whole or in part by individual states. It is updated every three years, with the most recent version being the 2012 IECC. These State Code Guides help determine what the IECC requirements for each state and county would be under various versions of the code.
The EWC State Fact Sheets provide a simple, portable step-by-step guide to selecting energy efficient windows considering the conditions in that state. Each one summarizes the key considerations found elsewhere on this site, and provides a summary of results from the Window Selection Tool for key cities in that state.
Residential Windows: A Guide to New Technology and Energy Performance
Window Systems for High-performance Buildings
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